Trouble upgrading ports collection

[edward]

Hi all,
I'm having a hard time upgrading my ports. I recently did a
# cvsup -g -L 2 ports-supfile
then did a
# portupgrade -ar0
which took care of a good share of my ports. But quite a few were 
skipped or failed. There wasn't much concerning these particular ports 
in /usr/ports/UPDATING. I did a pkgdb -F and tried my luck with 
portupgrade -ar0 again. A few ports were then successfully updated. I 
updated some others manually with a make desinstall / make reinstall 
sequence, but I'm still stuck with 3 ports that refuse to upgrade :

** Listing the failed packages (*:skipped / !:failed)
         ! graphics/libpixman (libpixman-0.1.6)  (invalid package name)
         ! multimedia/linux-realplayer (linux-realplayer-10.0.5) 
(uninstall error)
         * www/linuxpluginwrapper (linuxpluginwrapper-20050910)
         ! x11/kdelibs3 (kdelibs-3.4.2_1)        (linker error)
         * x11-wm/kompmgr (kdebase-kompmgr-3.4.2)
         * graphics/kdegraphics3 (kdegraphics-3.4.2_1)
         * x11/kdebase3 (kdebase-3.4.2_2)
         * x11-themes/kdeartwork3 (kdeartwork-3.4.2)
         * sysutils/k3b (k3b-0.11.14)
         * devel/kdesdk3 (kdesdk-3.4.2)
         * www/kdewebdev (kdewebdev-3.4.2,2)
         * deskutils/superkaramba (superkaramba-0.36_1)
         * x11-themes/gtk-qt-engine (gtk-qt-engine-0.6_2)
         * java/eclipse (eclipse-3.1_3)
         * net/azureus (azureus-2.3.0.4_1)
--->  Packages processed: 0 done, 272 ignored, 12 skipped and 3 failed


Apparently, xorg-clients is needed. I deinstalled it but the reinstall 
command gives an error. Tried portinstall xorg-clients, I get the 
following,at the end of the install/compile sequence :

: undefined reference to `glXGetProcAddress'
xdriinfo.o(.text+0x5b): In function `main':
: undefined reference to `glXGetProcAddress'
*** Error code 1

Stop in /usr/ports/x11/xorg-clients/work/xc/programs/xdriinfo.
*** Error code 1

Stop in /usr/ports/x11/xorg-clients/work/xc/programs.
*** Error code 1

Stop in /usr/ports/x11/xorg-clients.
** Command failed [exit code 1]: /usr/bin/script -qa 
/tmp/portinstall52875.0 make
** Fix the problem and try again.
** Listing the failed packages (*:skipped / !:failed)
         ! x11/xorg-clients      (linker error)
--->  Packages processed: 0 done, 0 ignored, 0 skipped and 1 failed
#
Any ideas ? (I realise this all seems pretty confused. Sorry, bear with 
me;-)
Edward